Just came across Pipl, a Search Engine for People on SEL.Pretty interesting is all I'll say at the moment; but the results I looked for were far from accurate.
Here's what SEL had to say about it:
Pipl is a people search engine that tries to be a little different. Rather than just go off and hunt for email addresses, this tries to search through the deep/invisible/hidden web to return content that other search engines are going to miss.
[...] This however maybe a little churlish, given that it's only recently launched. It's an engine that's worth taking a peek at - even if it's only to see what they have on you and your namesakes. It will probably be more than you expect.